Core network node, UE, access network node and controlling method

Abstract

The present disclosure proposes combined registration for mobile terminals with multiple SIM subscription from the same PLMN. A mobile terminal with two or more SIM subscriptions from the same PLMN registers for all SIM subscriptions to the same AMF or for each SIM subscription, to different AMFs, or to different RATs via a single combined registration procedure. A combined deregistration procedure is also disclosed in which the UE can deregister for all SIM subscriptions in a single combined deregistration procedure.

What is claimed is: 
     
       1. A core network node for mobility management, comprising:
 a memory storing instructions; and 
 one or more processors configured to execute the instructions to:
 receive, in a registration procedure, from a user equipment (UE), a first message comprising a first parameter related to a Multi-Subscriber Identity Module (Multi-SIM) capability of the UE, wherein the first parameter is different from a UE identity (ID) related parameter and is based on the UE activating Multi-SIM; 
 after receipt of the first message, transmit, to the UE, a second message comprising a second parameter related to the Multi-SIM capability of the UE; and 
 receive, from the UE, a third message comprising a third parameter related to the Multi-SIM capability of the UE, wherein the third parameter is different from the UE ID related parameter, the third parameter has a value different from a value of the first parameter, and the third parameter is based on the UE activating a Single-SIM. 
 
 
     
     
       2. The core network node according to  claim 1 , wherein the core network node is an Access and Mobility Management Function (AMF) node. 
     
     
       3. A user equipment (UE), comprising:
 a memory storing instructions; and 
 one or more processors configured to execute the instructions to:
 transmit, in a registration procedure, to a core network node for mobility management, a first message comprising a first parameter related to a Multi-Subscriber Identity Module (Multi-SIM) capability of the UE, wherein the first parameter is different from a UE identity (ID) related parameter and is based on the UE activating Multi-SIM; 
 after transmission of the first message, receive, from the core network node for mobility management, a second message comprising a second parameter related to the Multi-SIM capability of the UE; and 
 transmit, to the core network node for mobility management, a third message comprising a third parameter related to the Multi-SIM capability of the UE, wherein the third parameter is different from the UE ID related parameter, the third parameter has a value different from a value of the first parameter, and the third parameter is based on the UE activating a Single-SIM. 
 
 
     
     
       4. The UE according to  claim 3 , wherein the core network node is an Access and Mobility Management Function (AMF) node. 
     
     
       5. A method for a core network node for mobility management, the method comprising:
 receiving, in a registration procedure, from a user equipment (UE), a first message comprising a first parameter related to a Multi-Subscriber Identity Module (Multi-SIM) capability of the UE, wherein the first parameter is different from a UE identity (ID) related parameter and is based on the UE activating Multi-SIM; 
 after the receiving the first message, transmitting, to the UE, a second message comprising a second parameter related to the Multi-SIM capability of the UE; and 
 receiving, from the UE, a third message comprising a third parameter related to the Multi-SIM capability of the UE, wherein the third parameter is different from the UE ID related parameter, the third parameter has a value different from a value of the first parameter, and the third parameter is based on the UE activating a Single-SIM. 
 
     
     
       6. The method according to  claim 5 , wherein the core network node is an Access and Mobility Management Function (AMF) node. 
     
     
       7. A method for a user equipment (UE), the method comprising:
 transmitting, in a registration procedure, to a core network node for mobility management, a first message comprising a first parameter related to a Multi-Subscriber Identity Module (Multi-SIM) capability of the UE, wherein the first parameter is different from a UE identity (ID) related parameter and is based on the UE activating Multi-SIM; 
 after the transmitting the first message, receiving, from the core network node for mobility management, a second message comprising a second parameter related to the Multi-SIM capability of the UE; and 
 transmitting, to the core network node for mobility management, a third message comprising a third parameter related to the Multi-SIM capability of the UE, wherein the third parameter is different from the UE ID related parameter, the third parameter has a value different from a value of the first parameter, and the third parameter is based on the UE activating a Single-SIM. 
 
     
     
       8. The method according to  claim 7 , wherein the core network node is an Access and Mobility Management Function (AMF) node.